i think that in order to address the attitudes you must also and quite often first address the behaviours caused by those attitudes one of those behaviours is yelling slurs by making those slurs unacceptable the process is started to change the attitudes once enough of the attitudes change i think those words can get reabsorbed the word nigger is still unacceptable mostly for people to say other than referring to itself i doubt it will ever be used to describe black people again and at some point in time will disappear from the dictionary i think it unlikely that more recent slurs will be so unacceptable and that they will return to acceptability sooner but i do agree that the power of these words as insults when its a minority doing it is in the attitude